[PATCH v2] Input: Bug 18122 - Support Lenovo S10-3t's 2-buttonClickPad

[Yan Li]

This is for kernel bug #18122 and MeeGo bug #4807, version 2.

Lenovo S10-3t's ClickPad is a 2-button ClickPad that reports BTN_LEFT
and BTN_RIGHT as normal touchpad, unlike the 1-button ClickPad used in
HP mini 210 that reports solely BTN_MIDDLE.

Of c0-cap response, the 1-button ClickPad has the 20-bit set while
2-button ClickPad has the 8-bit set.

This patch makes the kernel only handle 1-button ClickPad specially,
and treat 2-button ClickPad as same as other normal touchpads.

Signed-off-by: Yan Li <yan.i.li@xxxxxxxxx>
---
 drivers/input/mouse/synaptics.h |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index 613a365..20468b6 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -51,7 +51,13 @@
 #define SYN_EXT_CAP_REQUESTS(c)		(((c) & 0x700000) >> 20)
 #define SYN_CAP_MULTI_BUTTON_NO(ec)	(((ec) & 0x00f000) >> 12)
 #define SYN_CAP_PRODUCT_ID(ec)		(((ec) & 0xff0000) >> 16)
-#define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100100)
+/* This macro detects 1-button ClickPad. Of ex0c capacity, if the
+ * 20-bit of ex0c is set the touchpad is a 1-button ClickPad, which
+ * needs special handling because it reports only BTN_MIDDLE.  If the
+ * 8-bit is set it is a 2-button ClickPad which reports BTN_* events
+ * normally and needs no special handling. Therefore this macro
+ * detects 1-button ClickPad only.  */
+#define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100000)
 #define SYN_CAP_MAX_DIMENSIONS(ex0c)	((ex0c) & 0x020000)
 
 /* synaptics modes query bits */
-- 
1.7.2.3


-- 
Best regards,
Li, Yan

MeeGo Team, Opensource Technology Center, SSG, Intel
Office tel.: +86-10-82171695 (inet: 8-758-1695)
OpenPGP key: 5C6C31EF
IRC: yanli on network irc.freenode.net
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